"It's a good beat," said Jeffery Harte, principal of Sandler O'Neill. "The credit trends are favorable, the expenses are in line, the capital markets stuff didn't miss too badly."

Regarding the drop in fixed-income trading revenue, the bank noted "lower revenue across all products was driven by sustained low volatility and tighter credit spreads." Equities trading revenue fell 4 percent "reflecting lower revenue in derivatives predominantly offset by strength in Prime Services and Cash Equities." The decline came off a strong third quarter last year.

This year's smooth financial markets have been tough on traders. This past September was the least volatile on record for the S&P 500, with an average daily range of 0.4 percent, according to LPL Financial.

Dimon did not comment specifically on the trading results in Thursday's press release, but trumpeted the bank's lead in consumer banking.

"For the first time, the Firm led the nation in total U.S. deposits, as consumers and businesses continue to view us as their partner of choice," Dimon said in a statement.

"The global economy continues to do well and the U.S. consumer remains healthy with solid wage growth," Dimon said. "Unfortunately, natural disasters in the U.S. and abroad have impacted many of our customers and we have responded with enormous financial support as well as the expertise and generosity of our employees to help these customers, clients and communities."

Average core loans rose 7 percent from last year to $837.5 billion, a 2 percent increase from the second quarter.

The demand for loans was "better than the lowered expectations" on Wall Street, Morningstar senior analyst Jim Sinegal said on CNBC's "Squawk Box." "I think a lot of people were worried that loan demand would drop a bit this quarter. We didn't see that. It seems fairly solid across the board."

Net interest income, a key measure of profitability, rose $1.2 billion from the third quarter last year to $13.1 billion.

Shares fell after the bank's second-quarter earnings report in July after JPMorgan lowered its net interest income forecast for the year by about $500 million to a $4 billion increase from the prior year.

Shares of JPMorgan have surged more than 38 percent since the election to record highs. Bank stocks overall have leaped since the November election. Promises of stimulus from the Trump administration and the Federal Reserve's move toward tighter monetary policy have helped Treasury yields rise, which tends to increase profit margins for banks.